Poetry books are well represented on library shelves and eagerly checked out by readers raised on Shel Silverstein and Dr. Seuss. Fans of their humor and wordplay will love Adam Rex’s two monstrous poetry collections, “Frankenstein Makes a Sandwich” and the brand-new ”Frankenstein Takes the Cake.” Each book features poems about famous monsters – Dracula, the Phantom of the Opera, Bigfoot – and their trials and tribulations.